Fortinet fortigate-200a Betriebsanweisung
System config
HA
FortiGate-200A Administration Guide
01-28006-0072-20041105
87
If you have more than one HA cluster on the same network, each cluster should have
a different group ID. If two clusters on the same network have the same group ID, the
duplicate MAC addresses cause addressing conflicts on the network.
a different group ID. If two clusters on the same network have the same group ID, the
duplicate MAC addresses cause addressing conflicts on the network.
Unit Priority
Optionally set the unit priority of the cluster unit. Each cluster unit can have a different
unit priority (the unit priority is not synchronized among cluster members). During HA
negotiation, the unit with the highest unit priority becomes the primary cluster unit. The
unit priority range is 0 to 255. The default unit priority is 128.
unit priority (the unit priority is not synchronized among cluster members). During HA
negotiation, the unit with the highest unit priority becomes the primary cluster unit. The
unit priority range is 0 to 255. The default unit priority is 128.
You can use the unit priority to control the order in which cluster units become the
primary cluster unit when a cluster unit fails. For example, if you have three
FortiGate-3600s in a cluster you can set the unit priorities as shown in
primary cluster unit when a cluster unit fails. For example, if you have three
FortiGate-3600s in a cluster you can set the unit priorities as shown in
Table 4
. Cluster
unit A will always be the primary cluster unit because it has the highest priority. If
cluster unit A fails, cluster unit B becomes the primary cluster unit because cluster unit
B has a higher unit priority than cluster unit C.
cluster unit A fails, cluster unit B becomes the primary cluster unit because cluster unit
B has a higher unit priority than cluster unit C.
The unit priority is not synchronized to all cluster units. Each cluster unit can have a
different unit priority.
different unit priority.
In a functioning cluster, if you change the unit priority of the current primary cluster unit
to a lower priority, when the cluster renegotiates a different cluster unit becomes the
primary cluster unit.
to a lower priority, when the cluster renegotiates a different cluster unit becomes the
primary cluster unit.
Override Master
Configure a cluster unit to always override the current primary cluster unit and become
the primary cluster unit. Enable override master for the cluster unit that you have given
the highest unit priority. Enabling Override Master means that this cluster unit always
becomes the primary cluster unit.
the primary cluster unit. Enable override master for the cluster unit that you have given
the highest unit priority. Enabling Override Master means that this cluster unit always
becomes the primary cluster unit.
Table 3: HA group ID and MAC address
Group ID
MAC Address
0
00-09-0f-06-ff-00
1
00-09-0f-06-ff-01
2
00-09-0f-06-ff-02
3
00-09-0f-06-ff-03
…
...
63
00-09-0f-06-ff-3f
Table 4: Example unit priorities for a cluster of three cluster units
Cluster unit
Unit priority
A
200
B
100
C
50